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Collection:
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NASA Astronomy Picture of the Day Collection
Collection
NASA Astronomy Picture of the Day Collection
Collection
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Title:
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Closeup of an Io Volcano
Title
Closeup of an Io Volcano
Title
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Explanation:
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In 1979, one of NASA's Voyager [ http://nssdc.gsfc.n…] spacecraft made a spectacular and unexpected discovery. Io, [ http://antwrp.gsfc.…] the innermost Galilean moon of Jupiter, was covered with volcanoes and some of them were erupting! In all, Voyager 1 observed nine volcanic eruptions during its encounter with the moon. When Voyager 2 flew past four months later it was able to confirm that at least six of them were still erupting. This Voyager image of Ra Patera, a large shield volcano, shows colorful flows up to about 200 miles long emanating from the dark central volcanic vent. For more information about volcanism on Io, see Calvin J. Hamilton's Io page [ http://www.c3.lanl.…] Tomorrow's picture: Geysers on Triton
Explanation
In 1979, one of NASA's Voyager [ http://nssdc.gsfc.n…] spacecraft made a spectacular and unexpected discovery. Io, [ http://antwrp.gsfc.…] the innermost Galilean moon of Jupiter, was covered with volcanoes and some of them were erupting! In all, Voyager 1 observed nine volcanic eruptions during its encounter with the moon. When Voyager 2 flew past four months later it was able to confirm that at least six of them were still erupting. This Voyager image of Ra Patera, a large shield volcano, shows colorful flows up to about 200 miles long emanating from the dark central volcanic vent. For more information about volcanism on Io, see Calvin J. Hamilton's Io page [ http://www.c3.lanl.…] Tomorrow's picture: Geysers on Triton Explanation
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Credit and Copyright:
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NASA, Voyager Project, Copyright Calvin J. Hamilton
Credit_and_Copyright
NASA, Voyager Project, Copyright Calvin J. Hamilton
Credit and Copyright
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facet_when:
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1979
facet_when
1979
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facet_where:
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Jupiter
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Jupiter
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facet_where:
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Hamilton
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Hamilton
facet_where
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facet_where:
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Triton
facet_where
Triton
facet_where
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facet_where:
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Goddard Space Flight Center (GSFC)
facet_where
Goddard Space Flight Center (GSFC)
facet_where
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facet_what:
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Voyager
facet_what
Voyager
facet_what
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facet_what:
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Moon
facet_what
Moon
facet_what
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facet_what:
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Jupiter
facet_what
Jupiter
facet_what
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facet_what:
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Voyager 2
facet_what
Voyager 2
facet_what
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facet_what:
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Voyager 1
facet_what
Voyager 1
facet_what
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facet_what:
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Io
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facet_when_year:
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1979
facet_when_year
1979
facet_when_year
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original url:
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original_url
original url
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UID:
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SPD-APOD-ap950804
UID
SPD-APOD-ap950804
UID
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